I think it’s interesting that the NYS DEC has never had a standardized font for its signs. 🛣️

Upper case moderate weight Helvetica seems to be the most popular font, but they sometimes mix in lower case.

Older signs are Alternate (Franklin) Gothic or maybe something like FHWA Series A but they sometimes still use that. Sometimes they will patch a damaged or alternative Alternative Gothic sign with Helvetica.

Lately they’ve been using FHWA Series D with lower case and something that looks like a knockoff of NPS Rawlson.

There has been a general resistance of park agencies to use FHWA fonts, the NPS uses Rawlson and Clarendon, and while the forest service does use FHWA fonts but with they do use a stylized National Forest script logo.